Decay of Rhizophora apiculata (Blume) and Xylocarpus granatum (Koenig) detrital sources in the Sarawak Mangrove, Malaysia

Kamal, Abu Hena Mustafa; Hoque, Mohammed Muzammel; Idris, Mohd Hanafi; Ahmed, Osumanu Haruna; Bhuiyan, Md. Khurshid Alam; Billah, Masum; Hoque, Md. Nesarul; Rosli, Zamri

doi:10.1007/s11676-018-0776-5

Cited by 9 publications

(5 citation statements)

References 50 publications

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“…The decay pattern of leaf litter of all species followed a single exponential function, only differing in the mass remaining over time. The kinetics of decay (decay constants, leaf half-life and 95% lifespan) observed in this study are comparable to findings by Ashton et al ( 1999 ), Chanda et al ( 2016 ), and Kamal et al ( 2020 ) (Table 3 ). Leaf litter was observed to disintegrate physically and fragment within 14 days for Acanthus , within 35 days for Rhizophora and Bruguiera , and within 70 days for Acrostichum .…”

Section: Discussionsupporting

confidence: 92%

Plant species- and stage-specific differences in microbial decay of mangrove leaf litter: the older the better?

2021

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Leaf litter and its breakdown products represent an important input of organic matter and nutrients to mangrove sediments and adjacent coastal ecosystems. It is commonly assumed that old-grown stands with mature trees contribute more to the permanent sediment organic matter pool than younger stands. However, neither are interspecific differences in leaf decay rates taken into account in this assumption nor is our understanding of the underlying mechanisms or drivers of differences in leaf chemistry sufficient. This study examines the influence of different plant species and ontogenetic stage on the microbial decay of mangrove leaf litter. A litterbag experiment was conducted in the Matang Mangrove Forest Reserve, Malaysia, to monitor leaf litter mass loss, and changes in leaf litter chemistry and microbial enzyme activity. Four mangrove species of different morphologies were selected, namely the trees Rhizophora apiculata and Bruguiera parviflora, the fern Acrostichum aureum and the shrub Acanthus ilicifolius. Decay rates of mangrove leaf litter decreased from A. ilicifolius to R. apiculata to B. parviflora to A. aureum. Leaf litter mass, total phenolic content, protein precipitation capacity and phenol oxidase activity were found to decline rapidly during the early stage of decay. Leaf litter from immature plants differed from that of mature plants in total phenolic content, phenolic signature, protein precipitating capacity and protease activity. For R. apiculata, but not of the other species, leaf litter from immature plants decayed faster than the litter of mature plants. The findings of this study advance our understanding of the organic matter dynamics in mangrove stands of different compositions and ages and will, thus, prove useful in mangrove forest management.

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Section: Discussionsupporting

confidence: 92%

Plant species- and stage-specific differences in microbial decay of mangrove leaf litter: the older the better?

2021

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“…However, comparisons of decay rates between wet and dry seasons may provide some insights. Several researchers have found that mangrove leaves decayed faster in the wet season than in the dry season (Aké‐Castillo et al, 2006; Chanda et al, 2016; Torres et al, 2018; Twilley et al, 1997; Van Vinh et al, 2020), whereas Kamal et al (2020) found that litter exhibited higher decay rates in the dry season. When leaves are wetted, there is an initial rapid leaching stage of the most labile OM and water‐soluble compounds (Mfilinge et al, 2002) are broken down due to fungal and bacterial action.…”

Section: Discussionmentioning

confidence: 99%

“…Biomass (leaf, root, wood) decay rates were averaged across genus. Due to low sample size of the other substrate types (i.e., pneumatophores, flowers, stipules), only leaves, roots, and wood were documented (however, see Albright (1976) and Kamal et al (2020) for additional biomass fractions).…”

Section: Methodsmentioning

confidence: 99%

Do global change variables alter mangrove decomposition? A systematic review

Simpson,

Chapman,

Simpson

et al. 2023

Global Ecol Biogeogr

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AimGlobal change is expected to modify the magnitude and trajectory of organic matter decomposition in mangrove ecosystems. Yet, the degree and direction of that change is unknown, especially considering the large C storage potential that mangroves provide. We performed a systematic review of primary literature to examine the relationships between genus‐specific litter quality, latitude or other global change proxies and decomposition of mangrove litter fractions.LocationGlobal.Time Period1976–2021.TaxonMangroves.MethodsWe compiled a dataset of 480 decomposition rates, including species, litter fraction, latitude, and relevant biophysical data. We investigated the influence of genera, tissue type, latitude, and global change proxies on decomposition rates using linear models and qualitative approaches. We also performed calculations to determine the potential importance of the decomposition process on the root litter biomass C pool in the context of blue C significance.ResultsCollectively, latitudinal relationships suggest that factors other than temperature, such as tissue type and genus, may regulate decay rates within mangroves' distributional range. Decay rates of leaf litter, roots, and wood converged on a value of 0.009 ± 0.0005, 0.002 ± 0.0001, and 0.001 ± 0.0003, respectively, across continents and geomorphological settings. Our calculations suggest that small changes in decomposition rate will not elicit large changes in blue C storage potential.ConclusionsThe main drivers behind variability in mangrove biomass decay rates detected across the distributional range remain uncertain. However, the small latitudinal range that mangroves inhabit and the submerged environment within which litter decomposes suggest that decay depends on species‐specific responses or biotic interactions among species to global change drivers. Few studies have examined global change impacts directly, and variability in decay and lack of representation of some mangrove groups in the literature suggest that implications for blue C are important to consider.

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“…The initial weight of each propagule was specified as 50 g referring to their average weight measured in the field. A decay constant of 0.007 was imposed to the particles as recommended by Kamal et al [49]. Through the calibration, a settling velocity of 5 m/d (equivalent to 0.0058 cm/s) was assigned to the propagules that ultimately produced the most reliable output.…”

Section: Numerical Modellingmentioning

confidence: 99%

Mangrove Propagule Dispersal in a Shallow and Narrow Coastal Lagoon: A Simulation-Based Assessment of the Setiu Wetlands, Malaysia

Zainol

Peris²,

Akhir

et al. 2022

Forests

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The short- to long-distance dispersal (SDD and LDD) of propagules is critical for the regeneration of mangrove forests. Mark–recapture experiments are considered to be a good tool for assessing such dispersal patterns. However, dense mangrove roots, exposed mudflats, shallow water, etc. often limit the number of recaptured propagules and their implication studies. Therefore, a combination of hydrodynamic and particle tracking models, together with a mark–recapture experiment, were applied to identify the dispersal behavior of Rhizophora mucronata Lamk. propagules in a coastal lagoon of Setiu Wetlands, Malaysia. The transport trajectories revealed that the dispersal of propagules is leptokurtic, with majority of them confined to very-short-distance dispersal (VSDD; 3–5 m) to SDD (1400 m). While higher obstacle density (e.g., mangrove roots) constrained the propagule dispersal, weaker tidal currents that coupled with less upstream discharge increased their retention time and settlement closer to the point of release. Under this scenario, the chances for propagules to exit from the lagoon mouth and their entry into the open waters for LDD are very limited. These results can explain the abundance of Rhizophora spp. in the northern sector of the Setiu Wetlands and be useful for species-level conservation/management.

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Decay of Rhizophora apiculata (Blume) and Xylocarpus granatum (Koenig) detrital sources in the Sarawak Mangrove, Malaysia

Cited by 9 publications

References 50 publications

Plant species- and stage-specific differences in microbial decay of mangrove leaf litter: the older the better?

Plant species- and stage-specific differences in microbial decay of mangrove leaf litter: the older the better?

Do global change variables alter mangrove decomposition? A systematic review

Mangrove Propagule Dispersal in a Shallow and Narrow Coastal Lagoon: A Simulation-Based Assessment of the Setiu Wetlands, Malaysia

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